Ohmite 45F5K0 5kΩ 5W Axial Wirewound Resistor – Equivalent & Substitute Parts

Part Overview

The Ohmite 45F5K0 is a 5 kOhm, ±1% tolerance, 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is classified as Active product status and is suitable for applications requiring precision resistive elements in through-hole configurations. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Substiute Parts

45F5K0

OhmiteIn Stock: 76345F5K0 Datasheet

Current PartRFQ

45F5K0E

OhmiteIn Stock: 79045F5K0E Datasheet

Parametric EquivalentRFQ

ALSR055K000FE12

Vishay DaleIn Stock: 891ALSR055K000FE12 Datasheet

DirectRFQ

45F5K0E

OhmiteIn Stock: 79045F5K0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Ohmite 45F5K0 is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance Value: 5 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package Configuration: Axial through-hole (exact match required)
• Termination Count: 2 (exact match required)

Substitute parts identified in this reference maintain these core parameters. Variations in temperature coefficient, physical dimensions, RoHS compliance status, and moisture resistance features are noted but do not preclude substitution when electrical and mechanical compatibility is the primary requirement.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 45F5K0E is the primary parametric equivalent, maintaining identical electrical specifications (5 kOhms, ±1%, 5W) and physical dimensions as the original 45F5K0. The 45F5K0E differs in RoHS compliance status (RoHS Compliant versus RoHS non-compliant) and packaging format (Bulk). This part is suitable for applications where RoHS compliance is required and packaging flexibility is acceptable.

Vishay Dale ALSR055K000FE12 is a direct manufacturer alternative that meets all core electrical parameters (5 kOhms, ±1%, 5W wirewound axial). This part features moisture-resistant construction, ROHS3 compliance, and a wider operating temperature range (-65°C ~ 250°C). Physical dimensions are slightly smaller (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L). The temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the Ohmite variants. This part is suitable for applications requiring enhanced environmental protection and extended temperature operation.

All three parts maintain Active product status and are available in current inventory.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite 45F5K0E be used as a direct replacement for the Ohmite 45F5K0?

A: Yes. Both parts share identical electrical specifications (5 kOhms, ±1%, 5W) and physical dimensions (0.343" Dia x 0.937" L). The primary difference is RoHS compliance status and packaging format. Electrical and mechanical compatibility is complete.

Q: What is the key difference between the Ohmite and Vishay Dale options?

A: The Vishay Dale ALSR055K000FE12 includes moisture-resistant construction and operates across a wider temperature range (-65°C ~ 250°C). Physical dimensions are slightly smaller, and the temperature coefficient is ±30ppm/°C versus ±20ppm/°C for Ohmite parts. All three maintain the required 5 kOhms, ±1%, 5W specifications.

Q: Are there any dimensional constraints when substituting the Vishay Dale ALSR055K000FE12?

A: The Vishay Dale part is slightly smaller in diameter (0.312" versus 0.343") and length (0.875" versus 0.937"). Verify that PCB layout and mechanical clearances accommodate these reduced dimensions before substitution.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: Both the Ohmite 45F5K0E (RoHS Compliant) and Vishay Dale ALSR055K000FE12 (ROHS3 Compliant) meet RoHS requirements. Selection depends on additional requirements such as moisture resistance, operating temperature range, and packaging preferences.

Q: Do all substitute parts maintain the same temperature coefficient?

A: No. Ohmite parts (45F5K0 and 45F5K0E) specify ±20ppm/°C, while the Vishay Dale ALSR055K000FE12 specifies ±30ppm/°C. For applications with strict temperature stability requirements, verify that the ±30ppm/°C specification is acceptable.